Egbert b



R. B. POOLE.

(No Model.)

CLAMP.

Patented Jan. 5, 1886.

m Q mu 4 m m m m a mu m mm m mm m% m m m WITNESSES:

wad-A Q- ATTORNEY.

UNITED STATES PATENT OFFICE.

ROBERT E. POOLE, OF UTIOA, NEW" YORK.

CLAMP.

SPECIFICATION forming part of Letters Patent No. 333,667, dated JanuaryS 1886.

Application filed February 8, 1884. Serial No. 120,189.

To all whom it may concern.-

Be it known that I, ROBERT B. POOLE, a citizen of the United States,residing in the city of Utica, in the county of Oneida and State of NewYork, have invented a new and useful Improvement in Clamping-Machines;and I do hereby declare the following to be a full, clear, and exactdescription of the same, reference being bad to the accompanyingdrawings, and to the letters and figures marked thereon.

My invention relates to that class of machines used in clamping orsqueezing sounding-boards for musical instruments and other purposes;and it consists in the mechanism hereinafter described and claimed.

In the accompanying drawings, Figure 1 represents a top view, the brokenlines indicating a section of the sounding-board re moved, exposing thebed-piece, which is bolted to the surface of a work-bench. Fig. 2 is alongitudinal section view through the center of the bed-plate. Fig. 3 isa top view of a section of the bed-plate. Fig. 4is an end view of thesame. Fig. 5isa side view of the same. Fig. 6 is a section of thebed-plate and the cam-circle. Fig. 7 is an end view of the slide.

In the accompanying drawings similar letters of reference refer tocorresponding parts throughout the several views.

In constructing my machine I provide bedplate A with circular cogs orprojections 12 on the upper surface. One edge of the cogs is verticalandthe otherbeveled. On thesides of the bed-piece I provide projectingflanges B B Fig. 4.

The bed-piece is provided with screw or bolt holes for securing the sameto a workbench or other suitable support.

I provide slide B, constructed to fit over the bed-plate, with grooves BB, Fig. 7, for embracing the flanges and for sliding on the same. On theupper surface of this slide I provide pivot or post E, for receiving androtating thereon circular screw-cam O, which has on the outer edgeprojecting flange or cam S, for engaging the cogs or projections on thebed-plate.

The pivot or post on slide B is (No model.)

the bed-plate, against which the work is crowded.

M represents the strips of wood to be operated on.

Operation: The slide and cam being in the position shown in Fig. 1, thestrips of wood to be operated on are placed against stationary stop R.The operator turns the crank from right to left, thereby moving the camscrew circle on the cogs or projections. Each revo lution moves theslide the distance of one cog or projection. For releasing the article,the cam screw circle is moved in the opposite direction.

I am aware that canrdisks pivoted to a bridge and engaging with a rackfor operating a clamping-disk and a lifting-jack worked by a cam diskhave been heretofore provided which embrace mechanism not claimed by me.

\Vhat I claim as new, and desire to secure by Letters Patent, is

1. In a clamping or compressing machine, the combination, with thebed-piece having cogs or projections with projecting flanges,substantially as shown, of the slide fittingover and sliding on thesame, with a cam screw circle pivoted thereon, as shown, with flange forengaging the cogs or projections, substantially as shown, for thepurposes stated.

2. In a clamping or compressing machine,

the combination of the bed-piece with cogs purposes stated.

ROBERT B. POOLE. WVitnesseS:

WILLIAM P. DUNN, J. K. BROWN.

